食品科学

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玉米肽体内外抗肿瘤活性

李江涛,张久亮,何 慧*,梁 栋,姚余祥,张 岩,赵宁宁   

  1. 华中农业大学食品科学技术学院,环境食品学教育部重点实验室,湖北 武汉 430070
  • 出版日期:2013-08-15 发布日期:2013-09-03
  • 通讯作者: 何 慧
  • 基金资助:

    国家自然科学基金项目(30972043);国家“863”计划项目(2008AA10Z314)

Antitumor Activity of Corn Peptides in vitro and in vivo

LI Jiang-tao,ZHANG Jiu-liang,HE Hui*,LIANG Dong,YAO Yu-xiang,ZHANG Yan,ZHAO Ning-ning   

  1. Key Laboratory of Environment Correlative Dietology, Ministry of Education, College of Food Science and Technology,
    Huazhong Agricultural University, Wuhan 430070, China
  • Online:2013-08-15 Published:2013-09-03
  • Contact: HE Hui

摘要:

目的:研究玉米肽(CPs)体内外的抗肿瘤作用。方法:选用人肝癌HepG2细胞进行体外实验,经CPs处理HepG2细胞后,借助透射电镜观察细胞形态学变化;在激光共聚焦显微镜下观察细胞内Ca2+浓度的变化;选用BABL/c小鼠进行体内实验,接种小鼠肝癌系H22细胞,考察CPs对H22荷瘤小鼠瘤质量、免疫器官指数、血清SOD活性及肝脏MDA含量的影响。结果:透射电镜观察显示,CPs作用48h后,HepG2细胞形态变化明显;同时细胞内的Ca2+浓度增加;CPs中、高剂量组能抑制H22荷瘤小鼠体内的肿瘤生长(P<0.05;P<0.01),CPs各剂量组均能增加小鼠胸腺指数,并提高小鼠脾脏指数、血清中SOD活性(P<0.01),降低其肝脏内MDA含量(P<0.01)。结论:CPs在体外具有诱导细胞凋亡作用,体内有抑制肿瘤增殖的作用。

关键词: 玉米肽, 抗肿瘤, 肝癌, 细胞凋亡, 抗氧化

Abstract:

To explore the antitumor activity of corn peptides (CPs) in vitro and in vivo, the morphology of HepG2 cells
and the change of Ca2+ concentration caused by CPs were observed by transmission electron microscopy and laser confocal
microscope, respectively. Meanwhile, H22 tumor-bearing mice were administered with CPs at different dosages by
intraperitoneal injection for 10 d. The anti-tumor activity of CPs was evaluated by tumor weight, thymus index and spleen
index, SOD activity and MDA content in tumor-bearing mice. The results showed that apoptosis characteristics such as
chromatin condensation, accumulation to the nuclear edge and cytoplasmic condensation, and increased intracellular Ca2+
concentration were obvious in HepG2 cells after CP treatments. Moreover, CPs could not only significantly suppress the
growth of H22 tumor in mice (P < 0.05; P < 0.01) and increase spleen index (P < 0.01), but also improve SOD activity in
the serum (P < 0.01), and MDA content (P < 0.01) in the liver of H22-bearing mice. Therefore, corn peptides can be a safe
and effective anticancer, bioactive agent or functional food.

Key words: corn peptides (CPs), antitumor activity, hepatocellular carcinoma, apoptosis, antioxidant activity

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